A complete biography of the lives of Jerry Leiber and Mike Stoller and their contribution to rock & roll could easily take up an entire book. Very simply, Leiber & Stoller were two of the most important songwriters of the early days of rock & roll. Although they had penned songs for R&B artists such as Jimmy Witherspoon, Floyd Dixon, and Charles Brown in the early '50s, Leiber & Stoller more or less exploded onto the rock scene in 1953 by writing "Hound Dog" for Big Mama Thornton (later to be covered by Elvis). From that point on, the duo composed and produced a string of hits that include some of the most instantly recognizable songs in rock history. They were also pushing the art of rock songwriting (and record production) into, at the time, uncharted territory. As is noted by critic Greg Shaw in The Rolling Stone Illustrated History of Rock and Roll: "They were the true architects of pop/rock...Their signal achievement was the marriage of rhythm & blues in its most primal form to the pop tradition."